[time-nuts] Crazy PPS

[Tom Van Baak]

Hi Joe,

In a case like this, where you're playing around with a GPSDO, you might want to log everything it has to output. Otherwise we play 20 questions about your antenna, your reception, your temperature, your cables, your neighbor, etc...

For these receivers I usually send a sys:stat? and diag:rosc:efc:abs? command every 30 seconds and log it to a file. Then if you notice anything odd happening in your 1PPS or 10 MHz performance, you just go back to the log file and have a look. It's only 5 MB per day.

/tvb

----- Original Message ----- 
From: "Joseph Gray" <jgray at zianet.com>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Monday, May 02, 2016 5:58 AM
Subject: [time-nuts] Crazy PPS


> After replacing the GPS module in Z3801A #2, I fired it up and let it
> run. For over an hour, things looked OK, then the PPS TI/s rose
> dramatically. Later, it started back down, Other than a high HUP,
> everything else looked good. What would cause this to happen?
> 
> https://dl.dropboxusercontent.com/u/19599147/Crazy%20PPS.png
> 
> 
> Joe Gray
> W5JG
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